Patent US2837553A successfully refreshed from Google Patents.
US2837553A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxidation of petroleum ceresin and novel product obtained thereby
Assignee: Sunoco Inc
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Filing: 1953-12-31
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Granted: 1958-06-03
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Expires: 1973-12-31
Abstract
No abstract record available.
Inventors
- 👤 Seymour W Ferris
- 👤 Herbert L Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:38
CPC Classifications
C; C10; C10G; C10G73/00; C10G73/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
METHOD FOR OBTAINAING OXIDIZED PETROLEUM CERESIN HAVING LOW PENETRATION AND HIGH VISCOSITY WHICH COMPRISES: OXIDIZING A PETROLEUM CERESIN HAVING MELTING POINT WITHIN THE APPORXIMATE RANGE FROM 175*F. TO 210*F. AT AN AVERAGE RATE EQUIVALENT TO 0.05 TO 1.25 INCREASE IN SAPONIFICATION NUMBER PER HOUR FOR THE PERIOD REQUIRED TO REACH A SAPONIFICATION NUMBER OF 65; AND TERMINATING THE OXIDATION WHEN THE SAPONIFICATION NUMBER OF THE TOTAL OXIDATION PRODUCT IS ABOVE 65 AND THE PENETRATION OF THE OXIDIZED WAX AT 77*F. IS LESS THAN IT WAS AT AN EARLIER STAGE OF THE OXIDATION.
Claim 2
Dependent Claim
92 words
METHOD FOR OBTAINAING OXIDIZED PETROLEUM CERESIN HAVING LOW PENETRATION AND HIGH VISCOSITY WHICH COMPRISES: OXIDIZING A PETROLEUM CERESIN HAVING MELTING POINT WITHIN THE APPORXIMATE RANGE FROM 175*F. TO 210*F. AT AN AVERAGE RATE EQUIVALENT TO 0.05 TO 1.25 INCREASE IN SAPONIFICATION NUMBER PER HOUR FOR THE PERIOD REQUIRED TO REACH A SAPONIFICATION NUMBER OF 65; AND TERMINATING THE OXIDATION WHEN THE SAPONIFICATION NUMBER OF THE TOTAL OXIDATION PRODUCT IS ABOVE 65 AND THE PENETRATION OF THE OXIDIZED WAX AT 77*F. IS LESS THAN IT WAS AT AN EARLIER STAGE OF THE OXIDATION.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-02 | 1961-12-02 | 1962-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-02 | 1965-12-02 | 1966-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-02 | 1969-12-02 | 1970-06-03 | $7700.00 | Window Closed / Lapsed |